Double Riptide Tridents

This bug is caused when you throw two tridents at the same time, but they are both riptide, you only get the force of one, for example if you throw a riptide III trident, it brings you about 40 blocks up, (I went from 67 to 106.2), but when I did a double-throw, I still only got to 106.2, can you fix this to allow it to shoot you twice as high?